Re: [Sip] Comment on DERIVE and B2BUAs

[Iñaki Baz Castillo <ibc at aliax.net>]

El Jueves, 30 de Octubre de 2008, Francois Audet escribió:
> Guys,
>
> Instead of using a SUBSCRIBE or even INFO, it seems appropriate
> to use OPTIONS.
>
> By definition, OPTIONS is intended to be routed the same way
> as an INVITE, and therefore would be more likly to end-up at the
> right place.

Any *current* SIP device already implementing RFC 4235 already implements this 
draft. But if it would be handled by other request (i.e. OPTIONS) then no one 
of the current implementations would support this draft now, and they would 
need to be modified.

Also, why sending dialog info into an OPTIONS while a SUBSCRIBE (Event: 
dialog;call-id=xxxx;to-tag=xxx) already defines it?
Sending that info into an OPTIONS would require a new kind of headers or XML 
body.



-- 
Iñaki Baz Castillo
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